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公开(公告)号:DK1779623T3
公开(公告)日:2010-05-25
申请号:DK05785474
申请日:2005-08-11
Applicant: INTERDIGITAL TECH CORP
Inventor: KWAK JAEYOUNG , OLESEN ROBERT LIND , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH , HUANG YUEJIN , PASAD KALPENDU R
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公开(公告)号:AT456232T
公开(公告)日:2010-02-15
申请号:AT05785474
申请日:2005-08-11
Applicant: INTERDIGITAL TECH CORP
Inventor: KWAK JAEYOUNG , OLESEN ROBERT , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH , HUANG YUEJIN , PASAD KALPENDU
Abstract: The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.
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公开(公告)号:AU2009208166A1
公开(公告)日:2009-09-10
申请号:AU2009208166
申请日:2009-08-14
Applicant: INTERDIGITAL TECH CORP
Inventor: BULTAN AYKUT , OZLUTURK FAITH , KOO CHANG-SOO , OLESEN ROBERT LIND , KWAK JAEYOUNG
Abstract: The invention relates to a method and a transmitter for transmitting data using multiple-input multiple-output, MIMO, orthogonal frequency division multiplexing, OFDM, the method comprising: a transmitter generating at least one input data stream; the transmitter generating a plurality of spatial streams; the transmitter determining a transmission coding scheme, and processing the input data stream in accordance with the transmission coding scheme to generate at least two spatial streams, the transmission coding scheme being one of spatial multiplexing, SM, without frequency diversity, FD, wherein one data symbol is sent per one sub-carrier for each spatial stream; and the transmitter transmitting the at least two spatial streams via the generated spatial streams.
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公开(公告)号:AT423409T
公开(公告)日:2009-03-15
申请号:AT05025778
申请日:2002-04-15
Applicant: INTERDIGITAL TECH CORP
Inventor: BULTAN AYKUT , GRIECO DONALD
IPC: H04B1/7085 , H04B1/709 , H04L7/02
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公开(公告)号:AR062513A1
公开(公告)日:2008-11-12
申请号:ARP070103761
申请日:2007-08-24
Applicant: INTERDIGITAL TECH CORP
Inventor: EL GAMAL HESHAM , BULTAN AYKUT , KOO CHANG-SOO
IPC: H04B7/005
Abstract: Se revela la comunicacion de enlace descendente (DL) de claves para un solo canal que es apoyada por la presencia de un transmisor y un receptor de sistema de varias entradas y varias salidas (MIMO). El transmisor incluye NT antenas transmisoras para la transmision de corrientes espaciales para un receptor que tiene NR las antenas receptoras, un precodificador y una unidad de construccion de matriz de espacio y frecuencia o espacio y tiempo en comunicacion con el precodificador y las antenas transmisoras. La unidad de construccion de matriz de espacio y frecuencia o espacio y tiempo define una matriz que define una clave de funcion espacio y tiempo algebraica de encaminamiento (TAST) en funcion de varias antenas virtuales, NV, y el numero de antenas transmisoras, NT. El transmisor funciona en un modo de lazo abierto cuando no está disponible la informacion de retroalimentacion del receptor, un modo de lazo semiabierto cuando la informacion de rango de canal está disponible, y un modo de lazo cerrado cuando la informacion del estado del canal (CSI) está disponible. El receptor está configurado para proporcionar retroalimentacion al transmisor por corriente espacial recibida.
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公开(公告)号:BRPI0516688A
公开(公告)日:2008-09-16
申请号:BRPI0516688
申请日:2005-11-01
Applicant: INTERDIGITAL TECH CORP
Inventor: KWAK JAEYOUNG , KOO CHANG-SOO , OLESEN ROBERT LIND , BULTAN AYKUT , OZLUTURK FATIH
Abstract: The invention relates to a method and a transmitter for transmitting data using multiple-input multiple-output, MIMO, orthogonal frequency division multiplexing, OFDM, the method comprising: a transmitter generating at least one input data stream; the transmitter generating a plurality of spatial streams; the transmitter determining a transmission coding scheme, and processing the input data stream in accordance with the transmission coding scheme to generate at least two spatial streams, the transmission coding scheme being one of spatial multiplexing, SM, without frequency diversity, FD, wherein one data symbol is sent per one sub-carrier for each spatial stream; and the transmitter transmitting the at least two spatial streams via the generated spatial streams.
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公开(公告)号:AT391364T
公开(公告)日:2008-04-15
申请号:AT04810253
申请日:2004-11-03
Applicant: INTERDIGITAL TECH CORP
Inventor: BULTAN AYKUT , GRIECO DONALD , DENNEAN CHARLES , PAN JUNG-LIN
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28.
公开(公告)号:AU2007287076A1
公开(公告)日:2008-02-28
申请号:AU2007287076
申请日:2007-08-23
Applicant: INTERDIGITAL TECH CORP
Inventor: KOO CHANG-SOO , BULTAN AYKUT , GAMAL HESHAM EL
IPC: H04L1/06
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公开(公告)号:MX2007001707A
公开(公告)日:2007-04-12
申请号:MX2007001707
申请日:2005-07-29
Applicant: INTERDIGITAL TECH CORP
Inventor: OZLUTURK FATIH , PIETRASKI PHILIP J , BULTAN AYKUT
Abstract: Se proporciona un metodo y aparato para control de recursos de radio en un sistema de comunicacion de multiplexado de division de frecuencia ortogonal (OFDM) de entrada multiple y salida multiple (MIMO). La metrica de canal se calcula para cada una de una pluralidad de antenas transmisoras. Se asignan subportadoras a cada antena transmisora de acuerdo con la metrica de canal de cada antena transmisora. Se transmiten las senales utilizando las subportadoras asignadas a cada antena. Se pude implementar adicionalmente modulacion y codificacion asi como control de potencia de transmision adaptables de cada subportadora de acuerdo con la metrica de canal. El control de potencia se puede implementar en base por antena o en base por subportadoras. Al realizar el control de potencia, se pueden seleccionar un subconjunto de antenas transmisoras y se puede aplicar la transferencia uniforme unicamente a las antenas seleccionadas. La transferencia uniforme se puede basar en SNR en vez de respuesta de canal.
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公开(公告)号:NO20071317L
公开(公告)日:2007-03-12
申请号:NO20071317
申请日:2007-03-12
Applicant: INTERDIGITAL TECH CORP
Inventor: OLESEN ROBERT LIND , KOO CHANG-SOO , BULTAN AYKUT , HUANG YUEJIN , OZLUTURK FATIH , ZEIRA ELDAD , KWAK JAEYOUNG , PASAD KALPENDU R
Abstract: The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.
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